Mohammed Saleh Hussain, 26, and his wife Roshanara Begum, 24, along with three children, aged between one and 11

The statement, which the BBC say was passed to them by a Briton fighting with IS, said the family had arrived in a land that was “free from corruption and oppression” and had not been “commanded” to join by a single person but by the “Khalifah of the Muslims”.